BIOD 151 Module 3 Exam Study Questions with Answers
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Course
BIOD 151
Institution
BIOD 151
Describe the shape of the stomach and its location relative to the abdomen and
diaphragm. - ANSWER stomach is a backward C-shaped organ located along the
left side of the abdomen and below the diaphragm
Describe the passage of food into and out of the stomach - ANSWER Food enters from
the esoph...
BIOD 151 Module 3 Exam Study
Questions with Answers
Describe the shape of the stomach and its location relative to the abdomen and
diaphragm. - ANSWER stomach is a backward C-shaped organ located along the
left side of the abdomen and below the diaphragm
Describe the passage of food into and out of the stomach - ANSWER Food enters from
the esophagus via the cardioesophageal sphincter and exits the stomach via the
pyloric sphincter into the small intestine
lesser curvature - ANSWER concave, extends inward on the shorter side of
the stomach
greater curvature - ANSWER convex, extends outward on the shorter side of the
stomach
lesser omentum - ANSWER serous membrane that attaches lesser curvature to the
liver
greater omentum - ANSWER serous membrane which attaches greater curvature to
the posterior wall of the body
two functions of the stomach - ANSWER 1. Temporary storage area for food, storing
up to two liters of partially digested food.
2. The muscular walls of the stomach contract vigorously and mix food with juices that
are secreted when food enters the stomach, allowing food to be broken down into
smaller pieces.
, The pH of stomach is 1.3 - 3.5. What is this due to and what is its source and function? -
ANSWER It is due to hydrochloric acid secreted by parietal cells. High acidity level kills
bacteria and converts inactive pepsinogen into active enzyme pepsin.
What is the source of the stomach enzyme pepsin and what is its function? - ANSWER
Inactive pepsinogen secreted by chief cells and converted into active enzyme pepsin by
HCI. Pepsin then begins breakdown of proteins.
What is a stomach ulcer? - ANSWER open sore on the stomach wall
Explain in detail how the stomach contents enter the small intestine - ANSWER The
pyloric sphincter valve, located at the base of the stomach, relaxes causing a small
quantity of chyme to pass through the opening into the first part of the small intestine.
This initiates a reflex that causes the muscles of the sphincter to contract and close the
opening temporarily. Then the sphincter relaxes again and allows more chyme to enter.
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